<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        body{
            /*background-image: url("./images/4.png");*/
            /*background-repeat: no-repeat;*/
            /*background-position: top center;*/
            /*background-attachment: fixed;*/
            /*height: 2000px;*/

            /*简写属性，可以同时设置所有的背景相关的样式*/
            background: #bfa url("./images/4.png")  no-repeat 400px 400px ;
        }
    </style>
</head>
<body>
</body>
</html>